DE2303849A1 - SUCTION DRIVER DEVICE - Google Patents

Description

M Λ-Γοη / nc-Fai; i 5CO

Goyo-Ballast Company Ltd., Tokyo, Japan

"Suction dredger"

The invention relates to a suction excavator device, comprising a ship's hull and a suspension-conducting line, in front of which a pump is received and its into the ground plugged mouthpiece by means of at least one cable of a Lifting device suspended from the hull int, polygamy Lifting device mainly consists of a cable storage container, provided with operating means for supporting and Piercing of cables regarding the depth of the mouthpiece of the mustard body and from a cable length changer, that in a plant area with low cable tension to prevent the cable from slackening when it rises Floor reaction at the mouthpiece takes in each cable and then emits the cable taken in.

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Such a suction dredger is from the Dutch Patent 48633 known.

This known suction dredging device is large Waves are not suitable for sucking up sand from the ground with a piece of dog pricked deep into the ground, because if the mouthpiece sticks with an upward movement of the hull, the bottom will grow down Ground reaction on the mouthpiece, which can break the cable or damage another part of the dredging device.

In the case of the suction dredging device according to the aforementioned Dutch Patent specification, wherein the conduit has at least one second lifting point, which by means of at least one second cable of a second lifting device on the hull is suspended, which lifting device has a cable storage container with operating means for supporting and Lower the second cable by the depth of the lifting point with regard to the hull is provided, and one when falling below the low set Cable tension includes cable occupying and captured cable releasing cable tension fuse, that is second cable of the second lifting point by means of the cable tension fuse held rigidly, but the second lifting point cannot, with this cable tension protection device can be set.

The invention has the task of cable break BEZW. damage to prevent other parts of the suction dredger when the mouthpiece is sucked into place. The invention also has the additional task to keep the second lifting point set in rough seas.

The invention provides and improves one in this regard

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A suction dredging apparatus comprising a hull and a suspension conducting conduit which houses a pump and its to be stuck in the ground Mouthpiece is suspended by at least one cable of a lifting device on the hull, which lifting device mainly consists of a cable storage container, provided with operating means for supporting and lowering cables to adjust the depth of the mouthpiece with respect to the hull and from a cable length changer, that in a plant area with low cable tension to prevent the cable from slackening when it rises Floor reaction at the mouthpiece takes up cable and then releases the cable taken in, thereby, that the cable length changer in a plant area with a higher cable length is lower than the impermissible, but higher than the low cable tension, to prevent impermissible cable tension in the event of a low floor reaction emits cables to the mouthpiece and essentially takes up all the emitted cable.

However, the invention improves the setting of the second Kebpunkts, which is particularly the right one It is important to set the depth of the pump that may be included in the line near this lifting point, the suction dredging device , wherein the conduit has at least one second lifting point connected by at least one second cable a second lifting device is suspended on the hull, which lifting device is a cable storage container with operating means for supporting and lowering the second cable by the depth of the lifting point with respect to the hull is provided, and one if the cable tension falls below the low set value Cable voltage fuse that releases the cable that has been taken in and that has been taken in comprises, in that the lifting device has a cable tension set when a higher level is exceeded

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Cable issuing and cable receiving cable voltage restrictors includes which low and high cable tension lower respectively. are bigger than those at the set depth of the lifting point nominal cable tension.

The invention will be explained in more detail in the following description with reference to a drawing.

They show schematically:

Figures 1, 2, 3 and 4 each show a side view of one according to Number height more preferred suction dredging device according to the invention ,

FIGS. 2a and 3a each show a force diagram of the cable length changer of the suction excavator device of FIGS. 3,

and FIG. 1b shows a plan view of detail II from FIG. 1.

The suction hager device 1 of FIG. 1 comprises a hull 2 floating on water 6 and a suspension flexible conduit 3 which conducts sand and water to a destination and in which a pump 4 is accommodated and its mouthpiece 5, which is located deep in the underwater 6 stored sand 7 to be sucked up, by means of a cable 8 a The lifting device 9 carried by the hull 2 is suspended from the hull 2. By means of one carried by the mouthpiece 5 Water pump 10, water 6 is brought through a pipe 11 into the ground at the inlet 12 of the mouthpiece 5, see above that a suspension of sand 7 and water 6 enters the line 3 through the inlet 12 of the mouthpiece 5. The lifting device 9 consists mainly of a cable storage container formed by a winch drum 13, the formed by a motor 14 and a gear 15

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Operating means is provided, which are operated for taking and lowering the cable 8 in order to adjust the depth H of the mouthpiece with respect to the vehicle 2, and a cable length changer 34 comprising a hydrapneumatic cable tension safety device 16 which is formed by a hydraulic cylinder 17 which is over a line 18 communicates with a pressure _{barrel 19, in which air 23 is sealed with a low pressure P 1} above liquid 24, which pressure P belongs to the work area 36 with low cable tension and corresponds approximately to the minimum cable tension required to prevent the cable 8 from slacking will. The piston rod 20 of the hydraulic cylinder 17 carries a cable pulley 21 for guiding the cable 8 which is diverted through the cable pulley 22. In the case of an upward Bodertreaction K to the mouthpiece 5 during a downward

Movement of the hull 2 due to the swell, the distance between the hull 2 and the mouthpiece 5 becomes temporary less than the set depth H and takes the cable tension fuse 16 by falling below the arranged Minimum cable tension cable 8 a by the piston rod 20 with the cable washer 21 then with a to the expected maximum change V of the sea state Maximum lift S moved up. On the next upward movement of the hull 2 increases the cable tension to up above the minimum cable tension, with the cable taken through downward ^ movement of the piston rod 20 is delivered.

The longitudinal cable change 34 also includes according to the invention a cable tension limiter 35, consisting of the winch drum 13 and a slip clutch 25 which is arranged between the gear 15 and the winch drum 13. if the sand 7 exerts a downward ground reaction K on the mouthpiece 5, e.g. by the mouthpiece 5 in the sand 7 is stuck, while the hull 2 moves enipor and the cable tension fuse 16 all captured cable

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The cable tension has risen to above the value set in the slip clutch 25 in the plant area 37 of the cable length changer 34 with higher cable tension, so that the winch drum 13 loosens the cable to prevent inadmissible cable jamming "

The suction excavator device 1 of FIG. 2 is identical to the suction excavator before device 1 of FIG. 1 in the sense that the cable tension limiter 35 is hydropneumatic. This cable tension limiter 35 is composed of a hydraulic cylinder 26 which communicates via a line 27 with a pressure barrel 28, in which air 29 with a high pressure B ₂ is closed over liquid 30, which pressure B ₂ is lower than a work area with higher cable tension the impermissible, but higher than the low cable tension. The piston rod 31 carries a cable disc: 32 for guiding the cable 8 diverted by the disc 22. The cable 8 is routed via disc 33 to the winch drum 13

moves the piston rod 31 downwards counter to the high pressure P_ and in this way releases the cable 8 _r which is subsequently taken up again when the hull 2 moves upwards. The wdaderhoit coming into effect of the cable tension limiter 35 is an instruction that more cables of the winch drum 13 have to be unwound in order to stop the movements of this cable tension limiter 35 counteracting a high pressure P 1. If the cable 8 is slackened, the piston rod 20 moves the opposing cable tension protection 6 up and down at a low pressure P. ■

The suction dredging device 1 in FIG. 3 is similar to the suction dredging device 1 of Figure 2, in the sense that instead of two hydropneumatic cylinders 17 and 26 for the cable voltage fuse 16 in the low plant area and for the

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Cable tension limiter 35 in the high work area only has a hydropneumatic cylinder 38 with a stroke T that is considerably is greater than the changes V of the cable length as a result the swell (see Figure 3a) is present. The lower end "39" and the upper end 40 of the cylinder 38 communicate with pressure vessels 41 and 42, in which air 43 respectively. 44 is locked.

FIG. 3a shows the components C and C ₂ working on the piston by OeI, as well as the resultant R at the different piston positions. In the plant area 36 with low pressure, the cable length changer 34 works as a cable tension safety device and in the plant area 37 as a cable tension limiter.

Since the cable length changer of FIG. 3 also works in the work area 45 lying between the work areas 36 and 37, it is possible to restrict the movements of the mouthpiece 5 with respect to the base 7, so that the mouthpiece 5 despite of the sea, can be kept fairly in its arranged piston position.

The suction dredger device 1 of FIG. 4 differs from the suction dredger device of FIG. 2 in that the Line 3 is composed of a rigid pipe section 46 and a rigid pipe section suspended pivotably on the hull 2 pipe section 47 pivotally connected to it, which is pivotally connected to the mouthpiece 5. These hinged links are universal paws. A second lifting point 49 at the lower end of the pipe section 46 in the vicinity a pump 4 accommodated in the line 3 is connected to a second lifting device 50 by means of a second cable 48 suspended on the hull 2. Another pump 55 is also located on board the hull 2. The lifting device 50 comprises a cable storage container, formed by a winch drum 51, which is provided with operating means 52

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for taking and fusing cable 48 is provided around üie Adjust the depth of the lifting point 49 with respect to the hull 2 so that the pump 4 is at the desired Depth and that the angle a. is less than a certain value to avoid / that the pipe pieces and 47 come approximately on a common longitudinal axis, with great compressive forces being excited during the swell could.

If the hull 2 is anchored by means of anchor wires 54, the hinge 67 moves during the sea by a position M_ between N and L and the lifting point 49 moves around the set point D between E and F. The to points D, E and F associated cable reactions P _n , P "and P" are dependent on the associated angles d, e and f.

L · jt '

In order to almost maintain the set depth H_ of the lifting point 49, a hydropneumatic cable tensioning device 53 is arranged which, if it falls below a low set cable tensioning P, which is less than the nominal _{cable tension P n} and greater than the cable reaction P ", during the downward movement of

Hull 2 cable 43 occupies During the upward movement of the hull 2, the taken cable 48 is released again and the cable tension limiter 56 then continues to release cable 48 if the cable tension exceeds the set value P, which is greater than the nominal cable tension P _n . When the hull 2 moves upward, the cable 48 that has been released is taken up again. With this second lifting device 50 it is achieved that the second lifting point 49 swings around the set TMe H_ with half a stroke up and down, which is smaller than the expected half high change V.

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Claims (1)

PATENT CLAIMS 1.Jsaugbaggervorrichtung, comprising a hull and a suspension-conducting conduit, in which a pump is accommodated and its mouthpiece to be inserted into the ground is suspended by means of at least one cable of a lifting device on the ship's hull, which lifting device mainly consists of a cable storage container, provided with operating means for supporting and lowering of Cable around the depth of the mouthpiece ^ with respect to the hull set and from a cable length changer that in a work area with low cable tension to avoid the cable hanging slack when the floor reacts upwards takes in each cable on the mouthpiece and then releases each taken in cable, characterized in that that the cable length changer is the lower in a plant area with higher cable tension than the impermissible, but higher than the low cable tension, to prevent impermissible cable tension in the case of lower Ground reaction to the mouthpiece releases cables and in essence releases everything ^ cable takes up. 2. suction dredger device according to claim 1, wherein the cable length changer one when the cable tension falls below a set low cable tension and when it increases the achieved low cable tension includes cable releasing cable tension fuse, thereby characterized that the cable length changer a when exceeding a set height Kabelspanmmg Cable releasing cable and cable tensioning limiter that is released when the cable tension is removed uiiifaast. , J. i'riU'ji UM ¹ ? '"" - /' jrrLchturicj according to claim 1 or 2, geke η η λ i ic υ ■: a i. by a hytkopneunuit · i; rl ■■ -, η cable length.- Λ 0 r) 8 ) 11 0 1 7 1 changer with a stroke that is considerably larger than that Changes in the cable length as a result of the sea and with a minimum cable tension up to the permissible Maximum cable tension over the stroke length progressively running tensioning force. 4. suction dredger device according to any one of the preceding claims, wherein the line at least one second Has a lifting point that is suspended from the hull by means of at least one second cable of a second lifting device, which lifting device has a cable storage container with operating means for supporting and fixing the second cable to adjust the depth of the lifting point with regard to the hull of the ship, and one if it is below the limit of the low set cable tension, cable occupying and ingested cable releasing cable! includes, as marked, that the lifting device emits and emits a cable when a set cable tension is exceeded Cable-capturing cable tension restrictors, which low and high cable tension lower resp. are greater than the nominal cable tension at the set depth of the lifting point. 3 0 9 B 3 3/0 3 7 7